Question

The figure below shows a room which is h = 12.0 feet tall and r = 30.0 feet wide. Attached to the ceiling is a piece of glass (with unknown index of refraction) which is 5.9 feet thick. A laser pointer in the bottom left corner is aimed so that the ray which reflects off the glass hits the room's bottom right corner. image:http://www.webassign.net/userimages/RoomWithRay.bmp?db=v4net&id=161419
(a) What is the ray's angle of incidence at the glass?
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(b) If the ray which refracts into the glass hits the ceiling 26.6 feet away from the left wall, what is the refracted ray's angle of refraction at the glass?
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(c) What is the glass's index of refraction?